Double integral - Area

Discussion in 'Math' started by xxxyyyba, Jan 12, 2014.

  1. xxxyyyba

    Thread Starter Member

    Aug 7, 2012
    249
    2
    Here are my task and my solution:

    As you can see, my result differs from actual result (result in brackets). What I did wrong?
     
    Last edited: Jan 12, 2014
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